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Alekssandra [29.7K]
3 years ago
5

Look at the illustration of four letters from the American Manual Alphabet. Decide whether the description of the letter is a go

od definition. If not, choose a counterex
You form the letter B by holding all four fingers tightly together and pointing them straight

A This is a good definition

B The letter A is counter example

C The F is counterexample

D The V is counterexample

Mathematics
1 answer:
natulia [17]3 years ago
8 0

Answer: this is a good definition

Step-by-step explanation:

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Annie walks 15 feet away from her house and places a mirror on the ground. She backs 4 feet away from the mirror so that she can
Firdavs [7]

Answer:

18.75 ft

Step-by-step explanation:

The given scenario can be drawn as shown in the following attachment.

Given that,

m\angle DCE=\angle ACB and m\angle DEC=\angle ABC=90^{\circ}

Therefore, \Delta ABC\sim \Delta DEC

\Rightarrow \dfrac{AB}{DE}=\dfrac{BC}{EC}

\Rightarrow \dfrac{AB}{5}=\dfrac{15}{4}

\Rightarrow AB=\dfrac{15\times 5}{4}=18.75 ft

AB is the height of the house.

7 0
4 years ago
Read 2 more answers
Help I will be marking brainliest!!!
Keith_Richards [23]
<h3>Answer:  A.  18*sqrt(3)</h3>

=============================================

Explanation:

We'll need the tangent rule

tan(angle) = opposite/adjacent

tan(R) = TH/HR

tan(30) = TH/54

sqrt(3)/3 = TH/54 ... use the unit circle

54*sqrt(3)/3 = TH .... multiply both sides by 54

(54/3)*sqrt(3) = TH

18*sqrt(3) = TH

TH = 18*sqrt(3) which points to <u>choice A</u> as the final answer

----------------------

An alternative method:

Triangle THR is a 30-60-90 triangle.

Let x be the measure of side TH. This side is opposite the smallest angle R = 30, so we consider this the short leg.

The hypotenuse is twice as long as x, so TR = 2x. This only applies to 30-60-90 triangles.

Now use the pythagorean theorem

a^2 + b^2 = c^2

(TH)^2 + (HR)^2 = (TR)^2

(x)^2 + (54)^2 = (2x)^2

x^2 + 2916 = 4x^2

2916 = 4x^2 - x^2

3x^2 = 2916

x^2 = 2916/3

x^2 = 972

x = sqrt(972)

x = sqrt(324*3)

x = sqrt(324)*sqrt(3)

x = 18*sqrt(3) which is the length of TH.

A slightly similar idea is to use the fact that if y is the long leg and x is the short leg, then y = x*sqrt(3). Plug in y = 54 and isolate x and you should get x = 18*sqrt(3). Again, this trick only works for 30-60-90 triangles.

4 0
3 years ago
some 8,000 crocus flowers required ro make 2 oumces of saffron. how many flowers are needed to make 16 ounces of saffron
tankabanditka [31]
8000=2 oumces
????=16 oumces
8000 x 16 divided by 2
answer=64,000 crocus
7 0
3 years ago
Read 2 more answers
What will be the coordinates of N after a 90 degree counterclockwise around the origin
Virty [35]

Answer:

The original point (x , y) —> the point rotated (-y , x)

Step-by-step explanation:

8 0
3 years ago
Please hurry <br> Select all the points that are on the graph of the line<br> 3x + 5y = 20 ?
Lynna [10]

Answer:

x=5

y=1

Step-by-step explanation:

3*5=15

5*1=5

15+5=20

8 0
3 years ago
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